I have rarely if ever encountered situations where any "extra" EQMs appeared in my account, and have generally remained silent about them, lest it come to the attention of those in authority, who might decide it had been a mistake.

The one time I can think of where extra EQMs "deservedly" appeared was a situation like that described above - a partner airline rebooked me in a higher fare class, and I got the EQMs for that fare class.